provisioners/ansible+ansible_local: inventory vars
provisioners/ansible+ansible_local: inventory vars

Add support for group and host variables in the generated inventory.

Close #6619

justincampbell/vagrant,taliesins/vagrant,mkuzmin/vagrant,sni/vagrant,johntron/vagrant,PatrickLang/vagrant,kamazee/vagrant,bshurts/vagrant,aaam/vagrant,vamegh/vagrant,johntron/vagrant,Endika/vagrant,justincampbell/vagrant,petems/vagrant,johntron/vagrant,Chhed13/vagrant,bdwyertech/vagrant,bryson/vagrant,tomfanning/vagrant,lukebakken/vagrant,lonniev/vagrant,krig/vagrant,petems/vagrant,sni/vagrant,sni/vagrant,PatrickLang/vagrant,aaam/vagrant,mitchellh/vagrant,signed8bit/vagrant,taliesins/vagrant,krig/vagrant,lukebakken/vagrant,mwrock/vagrant,benizi/vagrant,jtopper/vagrant,bryson/vagrant,chrisroberts/vagrant,justincampbell/vagrant,carlosefr/vagrant,PatOShea/vagrant,petems/vagrant,aneeshusa/vagrant,sax/vagrant,benizi/vagrant,jtopper/vagrant,benizi/vagrant,bryson/vagrant,kamigerami/vagrant,mitchellh/vagrant,sax/vagrant,crashlytics/vagrant,signed8bit/vagrant,mitchellh/vagrant,bdwyertech/vagrant,marxarelli/vagrant,Endika/vagrant,mkuzmin/vagrant,crashlytics/vagrant,TheBigBear/vagrant,benh57/vagrant,tomfanning/vagrant,bdwyertech/vagrant,tomfanning/vagrant,PatrickLang/vagrant,marxarelli/vagrant,carlosefr/vagrant,PatOShea/vagrant,chrisroberts/vagrant,gitebra/vagrant,Chhed13/vagrant,kamigerami/vagrant,vamegh/vagrant,lukebakken/vagrant,TheBigBear/vagrant,benh57/vagrant,PatOShea/vagrant,bshurts/vagrant,lonniev/vagrant,lonniev/vagrant,johntron/vagrant,Endika/vagrant,bshurts/vagrant,tomfanning/vagrant,Chhed13/vagrant,PatrickLang/vagrant,mkuzmin/vagrant,vamegh/vagrant,marxarelli/vagrant,lonniev/vagrant,carlosefr/vagrant,benh57/vagrant,benizi/vagrant,mwrock/vagrant,jtopper/vagrant,jtopper/vagrant,aneeshusa/vagrant,kamazee/vagrant,gitebra/vagrant,PatOShea/vagrant,krig/vagrant,kamazee/vagrant,lukebakken/vagrant,Chhed13/vagrant,mitchellh/vagrant,sax/vagrant,vamegh/vagrant,taliesins/vagrant,chrisroberts/vagrant,TheBigBear/vagrant,chrisroberts/vagrant,petems/vagrant,signed8bit/vagrant,aaam/vagrant,benh57/vagrant,kamigerami/vagrant,gitebra/vagrant,mwrock/vagrant,bdwyertech/vagrant,crashlytics/vagrant,sax/vagrant,justincampbell/vagrant,marxarelli/vagrant,Endika/vagrant,aneeshusa/vagrant,gitebra/vagrant,aaam/vagrant,taliesins/vagrant,crashlytics/vagrant,sni/vagrant,kamazee/vagrant,TheBigBear/vagrant,mwrock/vagrant,bshurts/vagrant,mkuzmin/vagrant,carlosefr/vagrant,kamigerami/vagrant,aneeshusa/vagrant,signed8bit/vagrant,bryson/vagrant,krig/vagrant